JP2932342B2 - Sheet material joining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of joining a plurality of sheet materials, and more particularly, to waterproofing a roof of a building such as a building or dumping or storing industrial waste while joining ends of a waterproof sheet. The present invention relates to a method of joining sheet materials to form a sheet.

[0002]

2. Description of the Related Art Sheet materials are laid for rooftop waterproofing of buildings such as buildings and the like, and sewage discharged from industrial waste dumped or stored on the ground flows out into the ground and pollutes the environment. It is laid for reasons such as prevention. In order to lay sheet materials on the roof of a building, especially on the dumping or storage of vast industrial waste, a plurality of sheet materials cut to a certain length are arranged and their ends are joined to each other. And do it.

[0003] Conventionally, as a sheet material laid on the roof of the above-mentioned building or on the dumping or storage of industrial waste, a waterproof, weatherproof (durable) made of ethylene-propylene-diene-based terpolymer rubber or the like has been used. Vulcanized rubber sheet having excellent properties). However, the vulcanized rubber sheet cannot be firmly joined with existing joining materials, and thus has a problem in joining durability. In particular, when laying sheet material on the ground surface with severe unevenness such as dumping or storage of industrial waste, a large tensile load or deformation will be applied to the joint, so that the joint durability will be further reduced. The problem was great. Moreover, the laying of a waterproof sheet or the like on the roof of the building or dumping or storage of industrial waste,
In general, since the work is performed by on-site construction where the facilities are not sufficient, there is a problem that when the above-mentioned sheet material is strongly joined, the work efficiency is significantly deteriorated.

Further, since the vulcanized rubber sheet does not have thermoplasticity (moldability), in a place having a large step such as a roof of a building, for example, the sheet material is cut in accordance with the step and cut. Therefore, there is a problem that the workability is deteriorated and a durable waterproof effect is hardly obtained.

[0005]

The object of the present invention is to solve the above, the vulcanized rubber, double the same or different comprising a thermoplastic elastomer
It is an object of the present invention to provide a joining method of sheet materials that enables a number of sheet materials to be joined to each other firmly. Another object of the present invention is to provide a sheet material joining method which enables joining with good work efficiency and workability.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vulcanized rubber and a butyl rubber comprising ethylene-propylene-diene terpolymer rubber (hereinafter abbreviated as EPDM). Vulcanized rubber composed of (isobutylene-isoprene copolymer rubber) (hereinafter abbreviated as IIR), thermoplastic elastomer composed of EPDM and polypropylene resin (hereinafter abbreviated as PP resin) (hereinafter, EPDM)
/ PP-based elastomer), EPDM, IIR and P
Thermoplastic elastomer made of P resin (hereinafter referred to as EPDM
/ IIR / PP elastomer) and IIR and P
Thermoplastic elastomer composed of P resin (hereinafter referred to as IIR /
A plurality of the same or different sheet materials formed from a material selected from the group of
Between sheet materials mutually, ultra high molecular weight polyethylene resin as the bonding material, a high density polyethylene resin (hereinafter, abbreviated as HDPE resin), PP resin, ethylene - propylene copolymer resin (hereinafter, abbreviated as EP resin), EPDM / PP Elastomer, EPDM / IIR / PP elastomer, I
At least one selected from the group consisting of an IR / PP elastomer and a styrene thermoplastic elastomer in a molten state
And then cooling the bonding material.

[0007] Thus, a plurality of the same or different types of the above specific species
About the sheet material of the above, the sheet materials are joined to each other by using at least one selected from the specific resin and the thermoplastic elastomer in a molten state as a joining material, and then the joining material is cooled, so that the joining material is cooled. In addition, it is possible to perform joining with high durability and with high working efficiency. It goes without saying that a joined state cannot be obtained unless the molten state is satisfied, that is, the condition of not less than the melting point is satisfied. Moreover, since the different kinds of vulcanized rubber sheets and thermoplastic elastomer sheets can be joined to each other, particularly a thermoplastic elastomer sheet having moldability, the workability can be significantly improved. An object of the present invention is to provide a vulcanized rubber sheet molded from EPDM or IIR with an EPDM / PP-based elastomer or EPD.
It can be achieved by directly laminating a sheet molded from the M / IIR / PP-based elastomer or the IIR / PP-based elastomer, heating and melting, and then cooling.

[0008] By directly bonding a specific thermoplastic elastomer sheet to a specific vulcanized rubber sheet in this manner, it is possible to omit the insertion and lamination of the bonding material, thereby further improving the working efficiency. become. In the present invention, as a sheet material, a conventionally known vulcanized rubber sheet such as EPDM or IIR having excellent moisture permeability (waterproofness), weather resistance, flexibility, etc., and strength properties, moisture permeability, flexibility, etc. A sheet made of a thermoplastic EPDM / PP-based elastomer and an EPDM / IIR / PP-based elastomer and an IIR / PP-based elastomer having excellent moldability and moldability is used.

[0009] The by <br/> sheet material of the vulcanized rubber to be used in the present invention, known EPDM, or IIR or a chlorinated isobutylene - isoprene copolymer rubber (hereinafter, Cl-IIR
And an unvulcanized rubber composition containing a brominated isobutylene-isoprene copolymer rubber (hereinafter abbreviated as Br-IIR) formed into a sheet and vulcanized, and is not particularly limited. . In addition, a butyl rubber containing the above Cl-IIR and Br-IIR can also be used as the butyl rubber in the bonding material.

[0010] In the present invention, the thermoplastic elastomer refers to a physical property defined by ASTM D-638 and ASTM D-1566, which is measured by the test method specified in ASTM D-638 and 28, page 756. That is, the tension set is 160% or less, the permanent compression set at 120 ° C x 72hr is 50% or less, the Young's modulus (a measure of flexibility) is 2500kgf / cm ² or less, and the rubber has elasticity at 120 ° C or less. Say.

Such an EPDM / PP elastomer, EPD
M / IIR / PP-based elastomer, IIR / PP-based elastomer, using a kneading extruder such as a mixer such as Banbury or Brabender or a twin-screw kneading extruder, melt the PP resin in these devices, After adding EPDM or EPDM and IIR or IIR to the mixture and finely kneading and dispersing them, the vulcanization of EPDM or EPDM and IIR or IIR is completed while masticating at a temperature at which vulcanization is promoted, and the rubber phase is removed. Forming, i.e., dynamic vulcanization (d
(dynamic cure or dynamic vulcanization).

In the thermoplastic elastomer obtained by the dynamic vulcanization, the rubber component forms a discontinuous phase and exhibits the same behavior as the vulcanized rubber, and the resin component forms a continuous phase.
The thermoplasticity enables the same molding process as that of the thermoplastic resin. By this dynamic vulcanization, usually, the PP resin forms a continuous phase and the EPDM or IIR forms a discontinuous phase, but forms a so-called salami structure in which the PP resin is further dispersed in the rubber component of the discontinuous phase. You may make it.

The vulcanization system of the rubber component in the dynamic vulcanization is not particularly limited, but EPDM is preferably a phenol system, a sulfur system or an organic peroxide. Also, IIR
Is preferably a phenol type, a sulfur type or a quinone dioxime type. The mixing ratio of the resin component and the rubber component constituting the thermoplastic elastomer is the total amount of the resin component and the rubber component.
The rubber component is used in an amount of 20 to 80 parts by weight, preferably 30 to 75 parts by weight, based on 100 parts by weight.

It is desirable that the rubber component of the thermoplastic elastomer is dispersed in the continuous phase resin component with a mean particle size of 50 μm or less, preferably 20 μm or less, more preferably 5 μm or less. In the present invention, a specific resin and a specific thermoplastic elastomer are selectively used as a joining material for the sheet material composed of the specific vulcanized rubber and the thermoplastic elastomer. These joining materials may be formed into a sheet shape and inserted independently between the sheet materials, or may be joined to the sheet material in advance and melted to contribute to the joining. You may. Alternatively, the molten state from the beginning may be applied to the edge of the sheet material.

The ultra-high molecular weight polyethylene has a molecular weight of 1
More than one million is preferred. The higher the molecular weight, the better, but the extremely high molecular weight is difficult to produce, so the limit is 5,000,000. If this ultrahigh molecular weight polyethylene is used in the form of a sheet in advance, it is difficult to extrude the sheet into a sheet.
C.), heat and pressure sintering is performed at a temperature of not less than a temperature, and the sheet is formed into a sheet, block, or column shape by shaving the formed product into a thin wall. Alternatively, the ultrahigh molecular weight polyethylene powder may be heated and pressed to form a sheet directly. The thickness of the sheet is preferably in the range of 50 μm to 1.5 mm. When the thickness is 50 μm or more, the bonding strength can be increased. On the other hand, when the thickness is 1.5 mm or less, the material can be easily melted by heating and workability can be improved.

As the HDPE resin, a commercially available HDPE resin can be used and is not particularly limited. Preferably
0.935 g / cm ³ or more, more preferably 0.940 to 0.965 g / cm ³
It is good to use what has the density of. PP resin and EP
Known resins can be used as the resin, and are not particularly limited.

EPDM / PP elastomer, EPDM
/ The IIR / PP elastomer and IIR / PP elastomer, it is possible to use the same <br/> sheet material made of the thermoplastic elastomer. As a styrene-based thermoplastic elastomer, an ethylene-butylene block, a polybutadiene block, a polyisoprene block, a hydrogenated polyolefin block, and the like, having a hard segment composed of a polystyrene block corresponding to a crosslinking point at both ends and exhibiting rubber elasticity in the middle. And an elastomer segment having both thermoplasticity and rubber-like elasticity, which are formed by molding, and having an elastomer segment such as an ethylene-butylene copolymer. Of these, a styrene-based thermoplastic elastomer whose intermediate elastomer segment is an ethylene-butylene block is preferred.

This styrenic thermoplastic elastomer has the following properties:
The material is heated and melted at a temperature of 00 ° C. or higher, and the melt is applied on a portion bonded with the above-mentioned bonding material, particularly, ultra-high molecular weight polyethylene to reinforce the material, thereby further improving the bonding strength. In the present invention, in order to bond the above-mentioned sheet material firmly, it is necessary to heat and melt the above-mentioned bonding material. The heating temperature is a temperature equal to or higher than the melting point thereof, and may be appropriately selected in consideration of pressure conditions and the like in accordance with the material characteristics within a range that does not cause deterioration, decomposition, or extreme deformation of the sheet and / or the bonding material. I just need. Preferably, the range of the melting point + 5 to 50 ° C is practically good. Further, the heating means is not particularly limited, and any heating means such as electric heating, hot air heating, hot plate heating, and high frequency induction heating can be used.

Further, in the present invention, the joint where the joining material is heated and melted is pressed by a press or the like, preferably by a pressure of 2 kgf / cm ² or more, more preferably 5 kgf / cm ² or more. The joining strength can be improved. If it is less than ² kgf / cm ² , the joining becomes unstable, which may hinder the practical use of the product. The surface of the sheet material may be subjected to anti-slip or graining for the purpose of improving the appearance. The joining may be performed at an appropriate pressure in consideration of the temperature condition depending on the state of the material surface. The upper limit of the pressure during the pressing is not particularly limited.
In the case of joining at a factory or the like, joining is preferably performed at a pressure of about 10 to 50 kgf / cm ² . Also, considering the simplicity of construction in the field, joining at ² to 10 kgf / cm ² is possible.

In the present invention, the sheet material may be joined by abutting the ends of the sheet materials 1 and 1 as shown in FIG. 1 or by joining the sheet materials 1 and 1 as shown in FIG.
The ends of the sheets 1 may be overlapped with each other, the sheet-like joining material 2 may be overlapped on these butted portions or overlapped portions, and the sheet-like joining material 2 may be heated and melted, and then cooled to be joined. When the ends of the sheet materials 1 and 1 are butted or overlapped in this way, as shown in FIG. 5 or FIG. 6, the joining material 2 in a directly molten state is applied and joined. Is also good. In this case, a sufficiently low pressure of about 2 kgf / cm ² enables a sufficiently strong bonding to be performed, thereby significantly improving workability.

When the sheet-like joining material 2 is used, as shown in FIG. 3A or FIG. 4A, the sheet material 1 is previously joined to both or one of the end portions of the sheet material 1 and the sheets are laminated. the bonding material 2 is heated and melted to fit, after pressing at least 2 kgf / cm ^2, pressure of preferably 5 to 20 kgf / cm ^2, by cooling, respectively Figure 3 (B) and FIG. 4 (B) It may be made to join like this.

Another joining method of the present invention is EPDM or
After directly laminating a thermoplastic elastomer sheet composed of EPDM / PP-based elastomer or EPDM / IIR / PP-based elastomer or IIR / PP-based elastomer on a vulcanized rubber sheet composed of IIR, and heating and melting the thermoplastic elastomer sheet, Cool while pressing at low pressure. Preferably at least 2 kgf / cm ² , more preferably 5 kgf / c
It is preferable to press at a pressure of m ² or less. Since this method does not require the interposition of a joining material, the method is excellent in workability and workability is remarkably improved. INDUSTRIAL APPLICABILITY The present invention can be applied not only to a construction surface such as a roof having relatively few irregularities, but also to a vast ground surface such as a mountainous region having marked irregularities. In particular, when the latter is to be applied to a remarkably uneven surface, a joining method of melting and applying a joining material as shown in FIGS. 5 and 6 is simple, excellent in workability and workability, and can obtain a large joint strength. It is advantageous.

[0023]

【Example】

Example 1 (Joining between sheet materials of the same kind) Six types of rubber compositions 1 to 5 having the compounding compositions shown in Table 1
Vulcanized rubber sheets 1 to 5 and 11 are manufactured from the thermoplastic elastomer sheets 6 to 9 and EPDM manufactured by Mitsui Petrochemical Co., Ltd.
An elastomer sheet 10 was manufactured from a thermoplastic elastomer (partially cross-linked product “Milastermer 9070N”) composed of PP and PP.

Each of the vulcanized rubber sheets 1 to 5 and 11 and the thermoplastic elastomer sheets 6 to 10 were each made to have a width of 300 mm ×
A plurality of pieces cut into a size of 300 mm in length and 1.5 mm in thickness were prepared. The melting points of the thermoplastic elastomer sheets measured by a differential scanning calorimeter (DSC) were 140 ° C. for the elastomer sheets 6 to 9 and 135 ° C. for the elastomer sheet 10.

[0025] In the above table, the figures are parts by weight. EPDM is Mitsui Petrochemicals Co., Ltd. "Mitsui EPT4070" IIR is Exxon Chemical Co., Ltd. "Exxonbutyl 268" Cl-IIR is Exxon Chemicals Co., Ltd. 1042 "HAF manufactured by Showa Cabot Co., Ltd." Show Black N330T "SAF manufactured by Asahi Carbon Co., Ltd." Asahi # 50 "Paraffin-based process oil manufactured by Showa Shell Co., Ltd." Machine oil 2 "
2 "Antiaging agent is N-phenyl-N'-isopropyl-p-phenylenediamine" Ozonone 3C "manufactured by Seiko Chemical Co., Ltd. TAIC is triallyl isocyanurate percadox 14/40 manufactured by Nippon Kasei Co., Ltd. Contains 3-bis- (t-butylperoxyisopropyl) -benzene 40% Brominated alkylphenol resin is “Takkilol 250-I” manufactured by Taoka Chemical Industry Co., Ltd. TT is tetramethylthiuram disulfide manufactured by Sanshin Chemical Industry Co., Ltd. “Suncellar TT
-PO "M is 2-mercaptobenzothiazole manufactured by Sanshin Chemical Industry Co., Ltd.
"Suncellar M" TS is Sanshin Chemical Co., Ltd. Tetramethylthiuram monosulfide "Suncellar T
SG "DM is benzothiazyl disulfide" Sancellar DM "manufactured by Sanshin Chemical Industry Co., Ltd. CZ is N-cyclohexyl-2-benzothiazylsulfenamide" Suncellar CM-G "manufactured by Sanshin Chemical Industry Co., Ltd.

The vulcanized rubber sheets 1, 3, 5 and 11 are sulfur vulcanized products, the vulcanized rubber sheet 2 is a peroxide vulcanized product, and the vulcanized rubber sheet 4 is a resin vulcanized product.

On the other hand, the five types of resins a to d and i shown in Table 3
And four types of thermoplastic elastomers e to h were formed into a sheet or a pellet, respectively, to prepare bonding materials a to i each having a size of 40 mm in width, 300 mm in length and 0.2 mm in thickness. In Table 3, the styrene-based thermoplastic elastomer is SEBS "Kraton G" manufactured by Shell Chemical Company. The EPDM / PP-based elastomer is a dynamically vulcanized product of EPDM / PP = 60/40 (weight ratio). The EPDM / IIR / PP-based elastomer is EPDM / IIR / PP = 20/40/40
(Weight ratio). The melting point is a value measured by a differential scanning calorimeter (DSC).

As shown in FIG. 4, bonding materials a to i shown in Table 3 are interposed between both ends of the vulcanized rubber sheets 1 to 5 and 11 and the thermoplastic elastomer sheets 6 to 10 to form sheets of the same kind. The materials are superimposed on each other, and the temperature is higher than the melting point (180 ° C. for the joining materials a, b, c, d, e, f, g, and h, and the joining material i
At 250 ° C.), using a hot plate press to heat and melt under a pressure of 20 kgf / cm ² , hold for 5 minutes, and then join by cooling.

The peeling test of the bonded portions of the sheet materials thus bonded was measured by the following method, and the results are shown in Table 4. Peeling test method : As a bonded sample, the above-mentioned heat-fused portion and the portion that was not fused by inserting release paper or the like between the sheets were peeled at room temperature starting from each, and then heated and fused. The joint was examined for damage.

The case where the sheet material was broken was judged as good (indicated by a mark), and the case where the interfacial peeling occurred was judged as bad (indicated by a mark x).

As shown in Table 4, vulcanized rubber sheets 1-5 and thermoplastic sheets 6-
In No. 10, no damage was recognized at the joint portion, and tear occurred at the sheet portion. On the other hand, the bonding material i (nylon
In both cases where the bonding was performed using the method 6) and when the vulcanized rubber sheet 11 was bonded with the bonding materials a to h, interfacial peeling occurred at the bonding portion, resulting in poor bonding (x).

The same type of vulcanized rubber sheets 1 to
5, 11 and the thermoplastic elastomer sheets 6 to 10
Direct superposition without interposition of bonding materials a to i
The sheet was heated at 180 ° C. for 5 minutes, and hot-pressed at 20 kgf / cm ² for joining. As a result of performing a peeling test in the same manner as described above, the thermoplastic elastomer sheets 6 to 10 showed good bondability (O), but the vulcanized rubber sheets 1 to 5, 11 showed poor bondability (X). Was.

Example 2 (Joining between Different Sheet Materials) The vulcanized rubber sheets 1 to 5, 11 and the thermoplastic elastomer sheets 6 to 10 of Example 1 were combined with each other as shown in Table 5 to combine different sheet materials. And joining materials a to i were used in the same manner as in Example 1. About these joining sheets, Example 1
Table 5 shows the results of the peel test performed in the same manner as described above.

[0034] In Table 5, the symbol-indicates that the test was not performed. As shown in Table 5, the bonding properties of the vulcanized rubber sheets 1 to 5 and the thermoplastic sheets 6 to 10 joined using the joining materials a to h were all good (○), but the joining material i (Nylon 6) and when the vulcanized rubber sheet 11 is joined with joining materials a to h
In all cases, bonding was poor (x).

Example 3 (Direct bonding) In Example 2, hot air at 400 ° C was applied to the overlapped portion of both ends of the sheet material without interposing the bonding materials a to i to make the sheet material into a molten state, and 5 kgf / cm. Bonding was performed directly under a pressure of ² . As a result of performing a peeling test in the same manner as in Example 2, the thermoplastic elastomer sheets 6 to 10 were excellent with respect to the vulcanized rubber sheets 1 to 5 other than the thermoplastic elastomer sheets 6 to 10 and the vulcanized rubber sheet 11 (○). ). On the other hand, poor bondability between the vulcanized rubber sheets 1 to 5 (x)
Met. In addition, the vulcanized rubber sheet 11 had poor bondability (x) to any of the thermoplastic elastomer sheets 6 to 10 and the vulcanized rubber sheets 1 to 5.

Example 4 (Other joining method 1) In Example 2, the combination of different types of sheet materials and the points of interposing the joining materials a to i are the same, and the joining method is shown in FIG.
As shown in the figure, the both ends of the sheet material are overlapped with a width of 40 mm, and an extruder (Munsch small extruder)
Each of the joining materials a to i processed into a string having a diameter of about 3 mmφ was melt extruded by using, and joined by applying a pressure of ² kgf / cm ² .

As a result of performing the above-described peeling test on each of the bonded sheets, the vulcanized rubber sheets 1 to 5 and the thermoplastic sheets 6 to 6 bonded using the bonding materials a to h in the same manner as in Example 2
In No. 10, the bondability was good (○). But,
In each of the cases where the joining was performed using the joining material i (nylon 6) and the case where the vulcanized rubber sheet 11 was joined with the joining materials a to h, the joining was poor (x).

Example 5 (Other joining method 2) In Example 2, the same combination of different kinds of sheet materials and the point of interposing the joining materials a to i are the same, and the joining method is shown in FIG.
As shown in (1), after a sheet-like joining material a to i having a width of 40 mm is previously fused to one end of one sheet material under pressure by a hot plate press, the other joining material a to i is The ends of the sheet material were overlapped and melted by blowing hot air at 400 ° C., and then cooled and joined by applying a pressure of 5 kgf / cm ² .

As a result of performing the above-mentioned peeling test on each of the bonded sheets, the vulcanized rubber sheets 1 to 5 and the thermoplastic sheets 6 to 5 bonded using the bonding materials a to h in the same manner as in Example 2
In No. 10, the bondability was good (○). On the other hand, in the case of joining using the joining material i (nylon 6) and the case in which the vulcanized rubber sheet 11 was joined with the joining materials a to h, the joining was poor (×).

Example 6 (Effect of Pressure) In Example 5, the pressure conditions were changed to 5 kgf / cm ² and 1.5 kgf / c
except for changing each m ² is attached at the same conditions, it was carried out the above peeling test for each joining sheet. As a result, when the pressure is set to 5 kgf / cm ² , the vulcanized rubber sheets 1 to 5 and the thermoplastic sheets 6 to 10 joined by using the joining materials a to h, as in the case of Example 2, In each case, the bondability was good (○). On the other hand, when the bonding is performed using the bonding material i (nylon 6) and the vulcanized rubber sheet 11 is used.
Were bonded with the bonding materials a to h, all were poor bonding (x).

On the other hand, when the pressure is set to 1.5 kgf / cm ² , a good bonding state and a poor bonding state are mixed, and the bonding becomes unstable, so that a sufficient bonding state cannot be obtained. Was. That is, from Examples 1 and 2, it can be seen that a good bonding state can be obtained by the presence of the bonding material as long as a certain bonding condition is satisfied for a combination of two specific sheet materials. Further, from Example 3, a specific combination which is more limited, specifically, EPDM vulcanized rubber sheet and IIR vulcanized rubber sheet, EPDM / PP type, EPDM / IIR / PP
It can be seen that a good bonding state can be obtained with each of the thermoplastic elastomer sheets and the IIR / PP thermoplastic elastomer sheets without a bonding material. Further, from Examples 4 and 5, as long as the above-mentioned certain bonding conditions are satisfied, a good bonding state can be obtained for the specific combination independently of the bonding method.
It is understood that the pressure is preferably set to ² kgf / cm ² or more.

[0042]

As described above, according to the present invention, the same kind or different kinds of vulcanized rubber and thermoplastic elastomer are used.
For a plurality of sheet materials , between the sheet materials, as a joining material, ultra-high molecular weight polyethylene resin, HDPE resin,
PP resin, EP resin, EPDM / PP elastomer,
EPDM / IIR / PP elastomer, IIR / PP
After at least one member selected from the group consisting of a thermoplastic elastomer and a styrene-based thermoplastic elastomer is used in a molten state and then cooled, a strong and durable bonding that does not deteriorate over time is enabled. In addition, not only the same type of vulcanized rubber sheet and thermoplastic elastomer sheet but also sheet materials made of different types of vulcanized rubber and thermoplastic elastomer can be joined to each other, so that the workability can be improved.

Further, with respect to a specific vulcanized rubber sheet material and a thermoplastic elastomer sheet material, it is possible to form the thermoplastic elastomer into a sheet material and directly bond the sheet material, thereby further improving workability. Can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a joint portion of a sheet material showing one embodiment of the method of the present invention.

FIG. 2 is a sectional view of a joining portion of a sheet material showing another embodiment of the method of the present invention.

FIG. 3A is a cross-sectional view showing a state before joining of sheet materials according to another embodiment of the method of the present invention. (B)
FIG. 3 is a cross-sectional view showing a state after the bonding of FIG.

FIG. 4A is a cross-sectional view showing a state before joining sheet materials according to yet another embodiment of the method of the present invention.
(B) is a sectional view showing the state after the joining of (A).

FIG. 5 is a cross-sectional view of a joint portion of a sheet material showing another embodiment of the method of the present invention.

FIG. 6 is a cross-sectional view of a joint portion of a sheet material showing another embodiment of the method of the present invention.

[Explanation of symbols]

 1 Sheet material 2 Bonding material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FIB29L 7:00 (72) Inventor Yura Departure 2-1 Oiwake, Hiratsuka-shi, Kanagawa Prefecture Yokohama Rubber Co., Ltd. Hiratsuka Works (58) Investigation Field (Int.Cl. ⁶ , DB name) E04D 5/14

Claims (7)

(57) [Claims] An ethylene-propylene-diene terpolymer vulcanizate, a butyl vulcanizate, a thermoplastic elastomer comprising an ethylene-propylene-diene terpolymer rubber and a polypropylene resin, ethylene-propylene -The same or different kinds of thermoplastic elastomers composed of a diene-based terpolymer rubber, a butyl-based rubber and a polypropylene resin, and a thermoplastic elastomer composed of a butyl-based rubber and a polypropylene resin.
For a plurality of sheet materials , between the sheet materials, as a joining material, an ultra-high-molecular-weight polyethylene resin, a high-density polyethylene resin, a polypropylene resin, an ethylene-propylene copolymer resin, an ethylene-propylene-diene-based terpolymer rubber, Thermoplastic elastomer composed of polypropylene resin, thermoplastic elastomer composed of ethylene-propylene-diene-based terpolymer rubber, butyl rubber and polypropylene resin, thermoplastic elastomer composed of butyl-based rubber and polypropylene resin, and styrene-based thermoplastic elastomer at least one was joined using a molten state and then joining method of sheet material to cool the bonding material selected from the group of. 2. The sheet material according to claim 1, wherein the ends of the plurality of sheet materials are abutted to each other , a sheet-like joining material is overlapped on the abutting portion, and the joining material is heated and melted and then cooled. Joining method. 3. The method according to claim 1, wherein the end portions of the plurality of sheet materials are overlapped with each other, a sheet-like joining material is inserted between the overlapping portions, and the joining material is heated and melted and then cooled. 3. The method for joining sheet materials according to 1. 4. A was butt or overlapped ends of the cross of the plurality of sheet materials, to the butted portion or the overlapped portion, according to the bonding material pre-molten state to claim 1 for cooling After coating cloth Sheet material joining method. 5. The bonding method for a sheet material according to claim 1, wherein the bonding material in the molten state is pressed together with the sheet material. 6. The sheet material joining method according to claim 5, wherein the pressure of the press is set to 2 kgf / cm ² or more. 7. A thermoplastic elastomer comprising an ethylene-propylene-diene-based terpolymer rubber and a polypropylene resin on a vulcanized rubber sheet molded from an ethylene-propylene-diene-based terpolymer rubber or a butyl-based rubber. Or a thermoplastic elastomer formed from a thermoplastic elastomer comprising ethylene-propylene-diene-based terpolymer rubber, butyl-based rubber and polypropylene resin, or a thermoplastic elastomer formed from a butyl-based rubber and polypropylene resin
A method of joining sheet materials in which stomer sheets are directly overlapped, the thermoplastic elastomer sheet is heated and melted, and then cooled.